Ambient Corporation Sells Construction Purchased Saws for $5,415 Less 43

Multiple Choice

Ambient Corporation sells construction purchased saws for $5,415 less 43% and 22%. Operating expenses are 22% of selling price. Ambient sells the saws for $3,042. During a recent sale a preferred customer was given the opportunity to purchase the saw for $2,585.70. What rate of mark-up was actually realized if the customer took advantage of this price?

A) 4.10%
B) 5.20%
C) 6.30%
D) 7.40%
E) 8.50%